Thread多线程样例--龟兔赛跑

Posted 2021-07-05 肖帆咪

public class RaceRG implements Runnable{
    private static String winner;

    @Override
    public void run() {
        for (int i = 0; i <= 1000; i++) {
            //兔子跑到一半休息一会
            if (Thread.currentThread().getName().equals("兔子") && i==500){
                try {
                    Thread.sleep(1);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
            boolean flag = gameOver(i);
            if (flag){
                break;
            }
            System.out.println(Thread.currentThread().getName()+"-->跑了"+i);
        }
    }

//判断谁先跑满1000米
    public boolean gameOver(int step){
        if (winner != null){
            return true;
        }else{
            if (step >= 1000){
                winner = Thread.currentThread().getName();
                System.out.println("winner is "+winner);
                return true;
            }
        }
        return false;
    }

    public static void main(String[] args) {
        /*同一个资源被多个线程使用*/
        RaceRG rg = new RaceRG();
        new Thread(rg,"兔子").start();
        new Thread(rg,"乌龟").start();
    }
}